Denon SC-L30 (1988)
The Denon SC-L30 is a compact 2-way bookshelf speaker from 1988, originally priced at ¥54,000 for a pair. It's a fairly obscure model in Denon's speaker lineup, and not much documentation survives. What is recorded shows some interesting late-80s engineering.
The main feature is Denon's original "Aero-Tube" enclosure system. A tube inside the cabinet picks up sound from the back of the woofer. That boosts low-frequency output and gives effective damping, which is a clever way to get deep bass out of a small box. The 12 cm cone woofer uses a double damper for large amplitude and a barium ferrite magnet. The tweeter is a G-B horn with a wide 120° dispersion area. Denon got there through computer analysis of acoustic energy flow and an optimized combination of Gaussian and Bessel curve shapes.
The cabinet is magnetically shielded, so it can sit next to a television without affecting the picture. A dedicated stand, the ASS-30, was sold separately for ¥11,000 per pair.
No period reviews of the SC-L30 have surfaced in the archive, so firsthand accounts of its sound are lacking. The record is what it is: a well-specified, thoughtfully engineered small speaker released by Denon in 1988.
- Type: 2-way, 2-speaker, bookshelf, magnetically shielded (EIAJ)
- Woofer: 12 cm cone with double damper
- Tweeter: Horn type (G-B), 120° dispersion
- Frequency response: 37 Hz – 30 kHz
- Impedance: 6 Ω
- Maximum input: 120W (EIAJ)
- Sensitivity: 89 dB/W/m
- Dimensions: 165 × 435 × 293 mm (W×H×D)
- Weight: 6.5 kg
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